<!--The content below is only a placeholder and can be replaced.-->
<div style="text-align:center">
  <h1>
    Welcome to {{title}}!
  </h1>
  <nav>
  <a routerLink="/home">home</a>
  <a routerLink="/topic-add">Add Topic</a>
  <a routerLink="/about">about</a>
</nav>
<button nz-button [nzType]="'primary'">测试按钮</button>
</div>
<app-index></app-index>
<router-outlet></router-outlet>
